Performance adjustment test method based on hydroelectric generating set management

Abstract

The invention relates to the technical field of hydroelectric generating set management, and discloses a performance adjustment test method based on hydroelectric generating set management. According to the method, the static deviation is calculated through the relation between the actual rotating speed, the actual flow and the rated parameters of the hydroelectric generating set which is calculated by shutting down the hydroelectric generating set, and the hydroelectric generating set is started to respectively collect the running data during starting, the running data during full load and the running data of partial load to obtain the dynamic deviation; power data of the hydroelectric generating set are recorded to obtain power deviation, then the hydroelectric generating set is scheduled, time when scheduling is sent out is recorded, stable time is recorded when output power is stable, response time is obtained by subtracting the stable time from the time when scheduling is sent out, and response deviation is obtained; and the performance deviation is obtained by integrating the static deviation, the dynamic deviation, the power deviation and the response deviation, so that the deviation value between the performance of the current hydroelectric generating set and the standard condition is obtained, and evaluation on the comprehensive performance of the set state is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of hydropower unit management, and specifically to a performance regulation test method based on hydropower unit management. Background Art

[0002] Objectively and scientifically evaluating the equipment status and ensuring the reliability of system operation and the economy of maintenance have become an urgent need for power generation enterprises to adapt to market competition. In order to obtain the best economic benefits, the existing after-event and planned maintenance modes are changed to an optimized maintenance mode;

[0003] Currently, the performance status monitoring of hydropower units is composed of some scattered and simple systems. There is a lack of organization and unity in the implementation strategy, and there is no consistency in both the basic information presentation form and the correlation between information. Simply combining these systems to form unit optimized maintenance can play a certain role in special monitoring and diagnosis, but it is difficult to detect and adjust the comprehensive performance of the unit status, and it is difficult to achieve the expected effect. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a performance regulation test method based on hydropower unit management, which has the advantages of clarifying the comprehensive performance of hydropower units and adjusting according to the performance, and solves the above technical problems.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solutions: A performance regulation test method based on hydropower unit management, including the following steps:

[0008] Step 1: Shut down the hydropower unit, collect the actual parameters of the hydropower unit, and calculate the static deviation JZPC between the actual parameters and the rated parameters based on the collected actual parameters;

[0009] Step 2: Start the hydropower unit, record the operation data three times, where the operation data includes flow rate, pressure and speed. The three operation data include the operation data at startup, the operation data at full load, and the operation data at partial load, and comprehensively calculate the three operation data to obtain the dynamic deviation DTPC;

[0010] Step 3: Start the hydropower unit, and record the power data of the hydropower unit, where the power data includes input power and output power, and obtain the power deviation GLPC in combination with the power data of the hydropower unit;

[0011] Step 4: Start the hydropower unit, record the response time when the hydropower unit reaches the set output power after scheduling, and obtain the response deviation XYPC based on the response time of the output power;

[0012] Step 5: Comprehensively calculate the static deviation obtained in Step 1, the dynamic deviation obtained in Step 2, the power deviation obtained in Step 3, and the response deviation obtained in Step 4 to finally obtain the performance deviation;

[0013] Step 6: The staff manages and commissions the hydropower unit according to the performance deviation calculated in Step 5.

[0014] As a preferred technical solution of the present invention, the expression of the actual parameters of the hydropower unit collected in Step 1 is as follows:

[0015]

[0016] Wherein, N_rated1,…,N_rated i ,…,N_rated I respectively represent the actual rotational speed of the hydropower unit collected for the first time, …, the actual rotational speed of the hydropower unit collected for the i-th time, …, the actual rotational speed of the hydropower unit collected for the I-th time, Q_rated1,…,Q_rated i ,…,Q_rated I respectively represent the actual flow rate of the hydropower unit collected for the first time, …, the actual flow rate of the hydropower unit collected for the i-th time, …, the actual flow rate of the hydropower unit collected for the I-th time, N_rated0 represents the rated rotational speed, Q_rated0 represents the rated flow rate, and SJCS represents the parameter data set.

[0017] As a preferred technical solution of the present invention, the expression of the static deviation between the actual parameters and the rated parameters calculated in Step 1 is as follows:

[0018]

[0019] Wherein, JZPC represents the static deviation, N_rated0 represents the rated rotational speed, Q_rated0 represents the rated flow rate, N_rated i represents the actual rotational speed of the hydropower unit collected for the i-th time, Q_rated i represents the actual flow rate of the hydropower unit collected for the i-th time, represents the sum of the differences between the actual rotational speeds of the hydropower unit collected I times and the rated rotational speed, represents the sum of the differences between the actual flow rates of the hydropower unit collected I times and the rated flow rate, and |*| represents the absolute value.

[0020] As a preferred technical solution of the present invention, the specific expressions of the three sets of operating data recorded in Step 2 are as follows:

[0021]

[0022] Among them, Q1 kj , P1 kj , N1 kj respectively represent the flow rate, pressure and rotational speed at startup, Q2 kj , P2 kj , N2 kj respectively represent the flow rate, pressure and rotational speed at full load, Q3 kj , P3 kj , N3 kj respectively represent the flow rate, pressure and rotational speed at part load, and DTYX represents the dynamic operation data set.

[0023] As a preferred technical solution of the present invention, the specific expression for calculating the dynamic deviation DTPC in step 2 is as follows:

[0024]

[0025] Among them, represents the sum of all flow rate deviation values, represents the sum of all pressure deviation values, represents the sum of all rotational speed deviation values, a = 1, 2, 3 represent the indices of startup, full load and part load, Q1 kj , P1 kj , N1 kj respectively represent the flow rate, pressure and rotational speed at startup, Q2 kj , P2 kj , N2 kj respectively represent the flow rate, pressure and rotational speed at full load, Q3 kj , P3 kj , N3 kj respectively represent the flow rate, pressure and rotational speed at part load, and DTPC represents the dynamic deviation.

[0026] As a preferred technical solution of the present invention, the expression for recording the power data of the hydroelectric generating unit in step 3 is as follows:

[0027]

[0028] Among them, inPOW1,…, inPOW j ,…, inPOW J represent the input power of the hydroelectric generating unit collected for the first time, …, the input power of the hydroelectric generating unit collected for the jth time, the input power of the hydroelectric generating unit collected for the Jth time, outPOW1,…, outPOW j ,…, outPOW J represent the output power of the hydroelectric generating unit collected for the first time, …, the output power of the hydroelectric generating unit collected for the jth time, the output power of the hydroelectric generating unit collected for the Jth time.

[0029] As a preferred technical solution of the present invention, the expression for the power deviation GLPC obtained from the power data of the hydropower unit is as follows:

[0030]

[0031] Wherein, minoutPOW1,…,outPOW j ,…,outPOW J represents the minimum value in the output power, max{inPOW1,…,inPOW j ,…,inPOW J} represents the maximum value in the input power, and GLPC represents the power deviation.

[0032] As a preferred technical solution of the present invention, the specific steps for recording the response time when the hydropower unit reaches the set output power after scheduling are as follows:

[0033] Step 4.1: Record the time when the scheduling is issued;

[0034] Step 4.2: Record the output power. When the output power within a time interval meets the requirement formula of the stability judgment function, record the stable time. The specific expression of the stability judgment function is as follows:

[0035]

[0036] Wherein, PD represents the stability judgment function, δ represents the stability judgment threshold, PD = 1 indicates that the stability judgment is met, PD = 0 indicates that the stability judgment is not met, Δt represents the time interval, P t represents the output power at time t, and P t-1 represents the output power at time t - 1;

[0037] Step 4.3: Subtract the stable time from the time when the scheduling is issued to obtain the response time.

[0038] As a preferred technical solution of the present invention, the specific expression of the response deviation XYPC is as follows:

[0039]

[0040] Wherein, t n represents the response time recorded for the nth time, t0 represents the rated response time, represents the maximum value in the calculation process of n times.

[0041] As a preferred technical solution of the present invention, the expression of the performance deviation recorded in step 5 is as follows:

[0042]

[0043] Among them, JZPC represents the static deviation, DTPC represents the dynamic deviation, GLPC represents the power deviation, XYPC represents the response deviation, and XNPC represents the performance deviation.

[0044] Compared with the prior art, the present invention provides a performance adjustment test method based on the management of a hydroelectric generating unit, which has the following beneficial effects:

[0045] The present invention calculates the static deviation by calculating the relationship between the actual speed and actual flow rate of the hydroelectric generating unit and the rated parameters after shutting down the hydroelectric generating unit, obtains the dynamic deviation by respectively collecting the operation data at startup, full load, and partial load when starting the hydroelectric generating unit, records the power data of the hydroelectric generating unit to obtain the power deviation, then schedules the hydroelectric generating unit, records the time when the scheduling is issued, records the stable time when the output power is stable, obtains the response deviation by subtracting the stable time from the time when the scheduling is issued, and obtains the performance deviation after comprehensively considering the static deviation, dynamic deviation, power deviation, and response deviation, so as to obtain the deviation value between the performance of the current hydroelectric generating unit and the standard situation, thereby ensuring the comprehensive performance evaluation of the unit state and providing a data basis for the comprehensive performance adjustment of the unit state. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the system framework of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] Please refer to Figure 1 , a performance adjustment test method based on the management of a hydroelectric generating unit, including the following steps:

[0049] Step 1: Shut down the hydroelectric generating unit, collect the actual parameters of the hydroelectric generating unit, and calculate the static deviation JZPC between the actual parameters and the rated parameters according to the collected actual parameters. The expression of the actual parameters of the hydroelectric generating unit collected in Step 1 is as follows:

[0050]

[0051] Among them, N_rated1,…,N_rated i ,…,N_rated Irespectively represent the actual speed of the hydropower unit collected for the first time, …, the actual speed of the hydropower unit collected for the i-th time, …, the actual speed of the hydropower unit collected for the I-th time, Q_rated1, …, Q_rated i , …, Q_rated I respectively represent the actual flow rate of the hydropower unit collected for the first time, …, the actual flow rate of the hydropower unit collected for the i-th time, …, the actual flow rate of the hydropower unit collected for the I-th time, N_rated0 represents the rated speed, Q_rated0 represents the rated flow rate, SJCS represents the parameter data set, and the expression for calculating the static deviation between the actual parameter and the rated parameter is as follows:

[0052]

[0053] Among them, JZPC represents the static deviation, N_rated0 represents the rated speed, Q_rated0 represents the rated flow rate, N_rated i represents the actual speed of the hydropower unit collected for the i-th time, Q_rated i represents the actual flow rate of the hydropower unit collected for the i-th time, represents the sum of the differences between the actual speed and the rated speed of the hydropower unit collected for a total of I times, represents the sum of the differences between the actual flow rate and the rated flow rate of the hydropower unit collected for a total of I times, |*| represents the absolute value;

[0054] Step 2: Start the hydropower unit and record the operation data three times. The operation data includes flow rate, pressure and speed. The three operation data include the operation data at startup, the operation data at full load and the operation data at partial load, and perform comprehensive calculation on the three operation data to obtain the dynamic deviation DTPC. The specific expressions of the three operation data recorded in step 2 are as follows:

[0055]

[0056] Among them, Q1 kj , P1 kj , N1 kj respectively represent the flow rate, pressure and speed at startup, Q2 kj , P2 kj , N2 kj respectively represent the flow rate, pressure and speed at full load, Q3 kj , P3 kj , N3 kj respectively represent the flow rate, pressure and speed at partial load, DTYX represents the dynamic operation data set, and the specific expression for calculating the dynamic deviation DTPC is as follows:

[0057]

[0058] Among them, represents the sum of all flow deviation values, represents the sum of all pressure deviation values, represents the sum of all rotational speed deviation values, a = 1, 2, 3 represent the indices of startup, full load, and partial load, Q1 kj , P1 kj , N1 kj respectively represent the flow rate, pressure, and rotational speed at startup, Q2 kj , P2 kj , N2 kj respectively represent the flow rate, pressure, and rotational speed at full load, Q3 kj , P3 kj , N3 kj respectively represent the flow rate, pressure, and rotational speed at partial load, DTPC represents the dynamic deviation, and the deviation situation of the unit under working conditions is quickly obtained by estimating the flow rate, pressure, and rotational speed under different loads;

[0059] Step 3: Start the hydropower unit and record the power data of the hydropower unit, where the power data includes input power and output power, and the power deviation GLPC is obtained by combining the power data of the hydropower unit. The expression for recording the power data of the hydropower unit in Step 3 is as follows:

[0060]

[0061] Among them, inPOW1, …, inPOW j , …, inPOW J represent the input power of the hydropower unit collected for the first time, …, the input power of the hydropower unit collected for the jth time, the input power of the hydropower unit collected for the Jth time, outPOW1, …, outPOW j , …, outPOW J represent the output power of the hydropower unit collected for the first time, …, the output power of the hydropower unit collected for the jth time, the output power of the hydropower unit collected for the Jth time. The expression for obtaining the power deviation GLPC from the power data of the hydropower unit is as follows:

[0062]

[0063] Among them, minoutPOW1, …, outPOW j , …, outPOW J represents the minimum value in the output power, max{inPOW1, …, inPOW j , …, inPOW J} represents the maximum value in the input power, and GLPC represents the power deviation;

[0064] Step 4: Start the hydropower unit, record the response time when the hydropower unit reaches the set output power after dispatching, and obtain the response deviation XYPC based on the response time of the output power. The specific steps for recording the response time when the hydropower unit reaches the set output power after dispatching are as follows:

[0065] Step 4.1: Record the time when the dispatch is issued;

[0066] Step 4.2: Record the output power. When the output power within a time interval meets the requirement formula of the stability judgment function, record the stable time. The specific expression of the stability judgment function is as follows:

[0067]

[0068] where PD represents the stability judgment function, δ represents the stability judgment threshold, PD = 1 indicates that the stability judgment is satisfied, PD = 0 indicates that the stability judgment is not satisfied, Δt represents the time interval, P t represents the output power at time t, P t-1 represents the output power at time t - 1. When PD = 1, it indicates that the stability judgment is satisfied. At this time, the output power is stable and the stable time is recorded. When PD = 0, it indicates that the stability judgment is not satisfied. At this time, the output power is unstable and wait until the next sampling interval;

[0069] Step 4.3: Subtract the time when the dispatch is issued from the stable time to obtain the response time;

[0070] The specific expression of the response deviation XYPC is as follows:

[0071]

[0072] where t n represents the response time recorded for the nth time, t0 represents the rated response time, represents the maximum value calculated during the n times;

[0073] Step 5: Perform a comprehensive calculation on the static deviation obtained in Step 1, the dynamic deviation obtained in Step 2, the power deviation obtained in Step 3, and the response deviation obtained in Step 4 to finally obtain the performance deviation. The expression of the performance deviation recorded in Step 5 is as follows:

[0074]

[0075] where JZPC represents the static deviation, DTPC represents the dynamic deviation, GLPC represents the power deviation, XYPC represents the response deviation, and XNPC represents the performance deviation;

[0076] Step 6: The staff conduct management and debugging on the hydropower unit according to the performance deviation calculated in Step 5. In this invention, first, the water supply to the hydropower unit is shut off to calculate the static deviation of the relationship between the actual rotational speed, actual flow rate of the hydropower unit and its rated parameters. Then, the hydropower unit is started, and the operating data at startup, at full load and at partial load are collected respectively to obtain the dynamic deviation, and the power data of the hydropower unit are recorded to obtain the power deviation. After that, the hydropower unit is scheduled, and the time when the scheduling is issued is recorded. When the output power is stable, the stable time is recorded. The response time is obtained by subtracting the stable time from the time when the scheduling is issued, and then the response deviation is obtained. After synthesizing the static deviation, dynamic deviation, power deviation and response deviation, the performance deviation is obtained. Finally, through the debugging of the staff, the performance deviation XNPC is made as low as possible, so as to ensure the stability of the performance of the hydropower unit. At the same time, the specific deviation situation of the unit can be predicted in time before performance adjustment, so as to better cope with the peak shaving and frequency modulation situations.

[0077] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A performance regulation test method based on the management of hydropower units, characterized in that: It includes the following steps: Step 1: Shut down the hydroelectric generating unit, collect the actual parameters of the hydroelectric generating unit, and calculate the static deviation JZPC between the actual parameters and the rated parameters based on the collected actual parameters; Step 2: Start the hydroelectric generating unit, record the operation data three times, where the operation data includes flow rate, pressure and rotational speed, the three times of operation data include the operation data at startup, the operation data at full load and the operation data at partial load, and comprehensively calculate the three times of operation data to obtain the dynamic deviation DTPC; Step 3: Start the hydroelectric generating unit and record the power data of the hydroelectric generating unit, where the power data includes input power and output power, and obtain the power deviation GLPC in combination with the power data of the hydroelectric generating unit; Step 4: Start the hydroelectric generating unit and record the response time when the hydroelectric generating unit reaches the set output power after dispatching, and obtain the response deviation XYPC based on the response time of the output power; Step 5: Comprehensively calculate the static deviation obtained in Step 1, the dynamic deviation obtained in Step 2, the power deviation obtained in Step 3 and the response deviation obtained in Step 4, and finally obtain the performance deviation; Step 6: The staff conducts management and debugging on the hydroelectric generating unit according to the performance deviation calculated in Step 5.

2. The performance regulation test method based on the management of hydropower units according to claim 1 is characterized in that: The expression of the actual parameters of the hydroelectric generating unit collected in Step 1 is as follows: Among them, N_rated1, …, N_rated i , …, N_rated I respectively represent the actual rotational speed of the hydropower unit collected for the first time, …, the actual rotational speed of the hydropower unit collected for the i-th time, …, the actual rotational speed of the hydropower unit collected for the I-th time, Q_rate1, …, Q_rated i , …, Q_rated I respectively represent the actual flow rate of the hydropower unit collected for the first time, …, the actual flow rate of the hydropower unit collected for the i-th time, …, the actual flow rate of the hydropower unit collected for the I-th time, N_rated0 represents the rated rotational speed, Q_rated0 represents the rated flow rate, and SJCS represents the parameter data set.

3. A performance regulation test method based on hydropower unit management according to claim 2, characterized in that: The expression of the static deviation between the actual parameters and the rated parameters calculated in Step 1 is as follows: Among them, JZPC represents the static deviation, N_rated0 represents the rated speed, Q_reted0 represents the rated flow rate, and N_reted i represents the actual speed of the hydropower unit collected at the i-th time, and Q_reted i represents the actual flow rate of the hydropower unit collected at the i-th time, represents the sum of the differences between the actual speed and the rated speed of the hydropower unit collected a total of I times, represents the sum of the differences between the actual flow rate and the rated flow rate of the hydropower unit collected a total of I times, and |*| represents the absolute value.

4. A performance adjustment test method based on the management of a hydropower unit according to claim 1, characterized in that: The specific expressions of the three times of operation data recorded in Step 2 are as follows: Among them, Q1 kj , P1 kj , N1 kj respectively represent the flow rate, pressure and rotational speed at startup, Q2 kj , P2 kj , N2 kj respectively represent the flow rate, pressure and rotational speed at full load, Q3 kj , P3 kj , N3 kj respectively represent the flow rate, pressure and rotational speed at partial load, and DTYX represents the dynamic operation data set.

5. The performance regulation test method based on the management of hydropower units according to claim 4, characterized in that: The specific expression of the dynamic deviation DTPC calculated in Step 2 is as follows: Among them, represents the sum of all flow deviation values, represents the sum of all pressure deviation values, represents the sum of all rotational speed deviation values, a = 1, 2, 3 represent the indices of startup, full load, and partial load, Q1 kj , P1 kj , N1 kj respectively represent the flow rate, pressure, and rotational speed at startup, Q2 kj , P2 kj , N2 kj respectively represent the flow rate, pressure, and rotational speed at full load, Q3 kj , P3 kj , N3 kj respectively represent the flow rate, pressure, and rotational speed at partial load, DTPC represents the dynamic deviation.

6. The performance adjustment test method based on the management of hydropower units according to claim 1, wherein: The expression of recording the power data of the hydroelectric generating unit in Step 3 is as follows: Among them, inPOW1, …, inPOW j , …, inPOW J represent the input power of the hydropower unit collected for the first time, …, the input power of the hydropower unit collected for the j-th time, and the input power of the hydropower unit collected for the J-th time. outPOW1, …, outPOW j , …, outPOW J represent the output power of the hydropower unit collected for the first time, …, the output power of the hydropower unit collected for the j-th time, and the output power of the hydropower unit collected for the J-th time.

7. A performance adjustment test method based on hydropower unit management according to claim 6, characterized in that: The expression of obtaining the power deviation GLPC from the power data of the hydroelectric generating unit is as follows: where, min{outPOW1, …, outPOW j , …, outPOW J} represents the minimum value among the output powers, max{inPOW1, …, inPOW j , …, inPOW J} represents the maximum value among the input powers, and GLPC represents the power deviation.

8. A performance adjustment test method based on the management of a hydropower unit according to claim 1, characterized in that: The specific steps of recording the response time when the hydroelectric generating unit reaches the set output power after dispatching are as follows: Step 4.1: Record the time when the dispatch is issued; Step 4.2: Record the output power, and record the stable time when the output power within a time interval meets the requirement formula of the stability judgment function. The specific expression of the stability judgment function is as follows: Among them, PD represents the stability judgment function, δ represents the stability judgment threshold, PD = 1 indicates that the stability judgment is satisfied, PD = 0 indicates that the stability judgment is not satisfied, Δt represents the time interval, P t represents the output power at time t, P t-1 represents the output power at time t - 1; Step 4.3: Subtract the time when the dispatch is issued from the stable time to obtain the response time.

9. A performance adjustment test method based on the management of hydropower units according to claim 8, characterized in that: The specific expression of the response deviation XYPC is as follows: where t n represents the response time of the nth record, and t0 represents the rated response time. represents the maximum value during the calculation of n times.

10. A performance adjustment test method based on hydropower unit management according to claim 1, characterized in that: The expression of the performance deviation recorded in Step 5 is as follows: Wherein, JZPC represents the static deviation, DTPC represents the dynamic deviation, GLPC represents the power deviation, XYPC represents the response deviation, and XNPC represents the performance deviation.

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